Title: The Effect of Concentration on Solubility
Purpose: To study the effect of increasing the concentration of an ionic compound on conductivity.
Data:
Solution:
Slope, m
1.0 M NaCl
8.8
1.0 M AICl
1.0 M CaCl2
150
Conclusion: The CaCl2 has the largest slope value at 8 drops the conductivity was 1,181. The smallest slope value was NaCl and at 8 drops it had 527 for conductivity.
Drinking Water Contamination Kit, Lab
Purpose: To rank five metals or hydrogen to figure out which ones are more reactant than the others.
Data:
Rank:
Metal:
1
Aluminum
2
Zinc
3
Iron
4
Lead
5
Copper
Compound Selected for analysis
Mass of crucible (g)
22.90
Mass of crucible and hydrated (wet) sample (g)
29.84
Mass of crucible and dehydrated (dry) sample - 1st weighing (g)
27.27
Mass of hydrated (wet) sample (g)
6.94
Mass of crucible and dehydrated sample - 2nd weighing (g)
27.27
Mass of crucible and dehydrated sample - if needed
Mass of dehydrated sample (g)
4.37
Mass of water evaporated (g)
2.57
Determination of a Hydrate/Lab
Purpose:
To determine the water hydration of a hygroscopic ionic compound, to find the formula of hydration for the compound Copper sulfate.
Procedure:
- Measure/record the mass of a dry, clean crucible.
- Then measure about 1.5g of the compound in the crucible. Next use a spatula to break up any large pieces of the substance by pressing those pieces against wall of crucible.
- Measure/record mass of crucible and compound.
- Next gently heat the crucible for about 10 minutes.
- Turn off burner. Allow the sample to cool for another 10 minutes.
- Once the crucible is cool enough to handle safely, record the mass of the crucible and it's contents.
- Repeat heating up the crucible for 5 more minutes, allow it to cool, then re-measure its mass.
- Repeat until you have 2 mass measurements that are within about 0.050g of each other.
Data: data table above
Conclusion:
moles of water - mass water (g) / 18.0 g/ml - .1428 mol
dehydrate - mass of dehydrate / molar mass dehydrate - .0273 mol
moles of water / moles of dehydrate - 5 mol
DATA ANALYSIS:
1. Copper Sulfate Pentahydrate
2. Less molecules of water and less molecules of dehydrate, but more molecules of hydrate.
Mendeleev: Predicting the Future?
Step 1: Filling graduated cylinder to the 10 mL mark.
Lavoisier a liar? Can matter really neither be created or destroyed?
Step 1: Adding 20.0 mL of distilled water.
Step 1: Dissolving the compound into the 20 mL of distilled water in beaker A.
Step 2: Measuring and recording the mass of beaker B.
Step 2: Adding 1.2000g of compound B in beaker B. Then adding 30 mL of distilled water to beaker B. Lastly, dissolving the compound.
Step 3: Adding solution A to solution B.
Step 3: Reaction after adding Solution B to Solution A.
Step 4: Folding the paper and placing it into a funnel.Step 5: Filtering the solution into beaker B.
Step 7: Recording the mass of the beakers when dry.
This is me and Rylee
My name is Macy
61.83 inches Penelope:64 inches Rex:68 inches Dirty Dawg:72 inches...The shoe size of the suspect is small and the smallest suspect out of all three is Penelope. The height of the suspect is roughly 62 inches tall. The suspect closest to that height is Penelope who is 64 inches tall. I believe that Penelope is the one that committed the murder.
Purpose: To study the effect of increasing the concentration of an ionic compound on conductivity.
Data:
Conclusion: The CaCl2 has the largest slope value at 8 drops the conductivity was 1,181. The smallest slope value was NaCl and at 8 drops it had 527 for conductivity.
Drinking Water Contamination Kit, Lab
Purpose: To rank five metals or hydrogen to figure out which ones are more reactant than the others.
Data:
Determination of a Hydrate/Lab
Purpose:
To determine the water hydration of a hygroscopic ionic compound, to find the formula of hydration for the compound Copper sulfate.Procedure:
- Measure/record the mass of a dry, clean crucible.- Then measure about 1.5g of the compound in the crucible. Next use a spatula to break up any large pieces of the substance by pressing those pieces against wall of crucible.
- Measure/record mass of crucible and compound.
- Next gently heat the crucible for about 10 minutes.
- Turn off burner. Allow the sample to cool for another 10 minutes.
- Once the crucible is cool enough to handle safely, record the mass of the crucible and it's contents.
- Repeat heating up the crucible for 5 more minutes, allow it to cool, then re-measure its mass.
- Repeat until you have 2 mass measurements that are within about 0.050g of each other.
Data: data table above
Conclusion:
moles of water - mass water (g) / 18.0 g/ml - .1428 moldehydrate - mass of dehydrate / molar mass dehydrate - .0273 mol
moles of water / moles of dehydrate - 5 mol
DATA ANALYSIS:
1. Copper Sulfate Pentahydrate
2. Less molecules of water and less molecules of dehydrate, but more molecules of hydrate.
Mendeleev: Predicting the Future?
Lavoisier a liar? Can matter really neither be created or destroyed?